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Patented April 2, 1861.

J. T. CLIEGG. Lamp.

UNITED sTATEs PATENT oEEroE.

JOHN T. CLEGG, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO IIIMSELF AND HENRY COULTER, OF SAME PLAGE.

LAMP.

Specification of Letters Patent No. 31,870, dated April 2, 1861.

To all whom 'it may concern:

Be it known that I, JOHN T. OLEGG, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Lamps; and I do hereby declare that the following is a clear, full, and exact description of the same, reference being had to accompanying drawings, and the letters of reference marked thereon, in which- Figure (l) represents aV Vertical section of the cap, also the flues around the regulating tube. Fig. (2) represents a plan of the same. Fig. (3) is merely a modification of the idea involved in the preceding figures without affecting in the least, any material change in the mode of operation. Fig. (il) is a top view of the same figure. Fig. (5) is a vertical section of the cap I use when burning wide wick. Fig. (8) represents a plan of same. Fig. (6) is a modification of the wide wick cap, showing how the same `result may be attained with but slight alteration. Figs. (7.) and (9) represent merely a mode of making an adjustable regulating tube which can be used upon the wick tube independent of the cap.

The nature of my invention consists in the employment of an open cap of a peculiar construction for the purpose of supplying to a flame of oil (or a flame from any other substance rich with carbon) the requisite quantity of oxygen at the point of combustion substantially in the manner hereinafter set forth.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

In Fig. -(1), (a) represents the cap which owing to its extreme simplicity I afn enabled to construct from a single piece of metal. It will be observed particularly that the top of said cap is so crooked that one side will be a little higher than the other as fully represented i`n Figs. (l) and (3) by letter e and a space cut out in the center of its top sufficiently large for the flame-as fully shown in Fig. The object in having one side of this space higher than the other is that the higher portion may impinge the flame` and thus convey the heat to the mouth of the wick tube. This however will be. more fully seen hereafter.

(Z9) represents a sliding tube which is provided with four flues extending up its sidesas seen in Fig. (2). At the bottom of these Iues should be aV small space cut for the purpose-0f admitting the air, and

thus creating a draft. Said tube is secured to the cap immediately under the spaoecut in its top and should be so adjusted that a space will be left between it and the lower side of the cap, also for the purpose of creating a draft. I would remark that it is not necessary to provide fiues on the sliding tube, as a sufficient draft can be ad-. mitted to the flame at the point of combustion by leaving a space between the tube and the lower side of the cap. Figs. and (4f) exhibit the modication in this respect.

The sides of the cap should be perforated as represented which will enable the lamp -to be ltransferred easily from one place to another without fear of the blaze being extinguished, as the fiame will penetrate the perforations, and thus render it difficult to be blown out.

Figs. (6) and (8) represent one form of cap I employ when burning wide wick, the construction of which is substantially the same as those already described. Care should be taken however that one side will impinge the flame while a draft is created on the opposite side for the purpose already mentioned.

l'Ihe whole object of this invention is t0 burn coal oil or any other substance rich with carbon in the most economical and perfect manner, or in other words, to consume the smallest quantity of carbon, to the greatest amount` of oxygen, to produce the largest volume of light. In order therefore to do this I feed the flame at the point of combustion with the requisite quantity of oxygen and impart to the wick tube the proper degree of heat at the right place. Thus I dispense with the chimney and am also enabled to make a lamp so small and simple that it may be readily lighted and carried about, and this without fear of the flame being extinguished or the lamp exploding from being too heavily charged with gas.

The operation is so obvious that it is unnecessary to explain Proper care should however be taken to adjust the cap as has already been shown.

Having thus fully described my invention, What I claim and desire to secure by Letters Patent is 1. An open Cap so Constructed that one side will irnpinge the fla-Ine, While upon the opposite side a space is left between the Wick tube of the lamp and the side of the cap for the purpose of creating a draft, and thus supplying,` the requisite quantity of oxygen to the ame at the point of oombustion, substantially as set forth.

2. The combination of a sliding regulating tube (with or Without lues) With an open cap, substantially in the manner and for the purpose specified.

JOHN T. CLEGG.

Witnesses T. 4 H. ALEXANDER, WM. HUGHES. 

